Gas turbine-engine.



E. M. 611. F. MAXWELL.

GAS TURBlNE ENGINE.

APPLICATION HLED JULY 3,1914.

l y l 3 9959@ e Patented May 18, 1915.

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UU e l l WLM/iconen @lllltlm EBASTUS M. MAXWELL AND JAMES F. MAXWELL, FCARDINAL, VIRGINIA.

GAS TURBINE-ENGINE.

Specification of Letters Patent.

lPatented May 18, 1915.

application filed July 3, 1914. Serial No. 848.821.

To 'all whomt may concern Be it known that we, ERASTUS M. MAX- WELL andJAMES F. MAXWELL. citizens of the United States, residing at Cardinal,in the lcounty of Mathews and State of 1Virginia,

have invented certain new and useful lmprovements in GasTurbine-Engines; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the 'art to which it appertains to make and use thesame.

Our invention relates to turbine engines of the gas type, and inparticular to stationary turbine engines.

The main object of our invention is to provide a device that is highlyefficient, compact, and durable.

Another object of our invention is to provide a device that has a doublewater j acket, a water jacket surrounding both the inner and outer wallsof the combustion chamber.

Still another object of our invention is to provide a device whereby thewater jacket has successively enlarged sections to allow of theadvantage of a pump action under centrifugal force. j

Still another object of our invention is to provide a device whereby theend thrust of thelexplosion is counterbalanced by the used fue A stillfurther object of our invention is to provide a device whereby themolecules of unburned gas are consumed within the combustion chamber.

A still further object of our invention is to provide a device wherebythe pressure of air, fuel and steam is automatically regulated as ameans of safety.

Other objects and advantages of our invention Will be hereinafter moreclearly set forth in the specifications and pointed out in the claims.'

Similar characters of reference refer to similar parts throughout thedrawings, in which,

Figure 1, is a side elevation of our device in assembled formation. Fig.2, is a sectional view therethrough. llig. 3, is a sectional view online 3 3 of Fig. 1.

in JFigs. 1 and 2 of the drawings, 1 is the casing surrounding ourengine, and formed to include an outer shell 2 and an inner shell 3forming a chamber 4 therebetween,

` and said casing is mounted upon a suitable base and has at one endthereof bearing supply pipe.

brackets 5 adapted tosupport a rotating driving shaft 6. A suitabledepression 7 is had in the top portion of the casing having a centralaperture 8 therethrough communicating with the combustion chamber 9, andin which is suitably mounted an air supply tube 10 and fuel supply tubel1, said air supply tube 10 feeding air thereto from a rotary air pump12, and said fuel supply pipe feeding fuel thereto from a rotary supplypump 13, the said supply tubes 10 and 11 having at intermediate pointsbranch tubes, said branch tube 11 of the air supply leading to asuitable storage tank to be used for starting purposes if necessary.

A branch tube 15 from the fuel supply tube leads back to the fuel tankto deliver excess fuel thereto. Suitable safety check valves 16 and 17of ordinary construction are formed in each of the branch tubes 14 and15 respectfully, and said check valves operate to open the passage wayVto said branch pipes when the feeding pressure reaches a` predeterminedpoint to thereby relieve the pressure of the supply of air and gas whenit reaches a dangerous point, this arrangement acting as a safetydevice.

Suitable driving gears 18 and 18, `are rigidly mounted upon the shaft 6to drive the air and fuel supply pumps, as shown in Fig. 3 of thedrawings. An air inlet 19 being had to supply 'air to my engine, saidair being fed to the engine through the pipe 10 from the mouth 20. Afuel supply opening 21 also feeds fuel through the pump 13 and feeds thefuel through the pipe 11 from the mouth 22. A suitable casing 23incloses the driving gear 18, and likewise, suitable casings 241 and 25cover the rotary pumps to pump the air and fuel into the engine.

A suitable spark plug 26 is mounted in the depression v7 adjacent to theopening of the mouths of the supply pipes 10 and 11 to lire thehydro-carbon fuel received from said At suitable intervals in the innerwall 3 of the casing 1 are mounted a plurality of blades 27 of ordinaryconstruction. interiory of this double walled outer casing is mounted adouble walled drum 28, said double walled drum having an outer wall 294and an inner wall 30 forming a water chamber 31 therebetween. Saidwater chamber having a plurality of stepped sections and 33 to behereinafter described.

it suitable intervals in the outer wall 29 v 34, said blades alternatingbetween the blades 27 mounted in the outer casing previously noted, andsaid alternate blades playing in the chamber formed therebetween, saidchamber having successively enlarged sections 35 and36.

suitable supply nozzle 37 is mounted the combustion chamber 9 somedistance A water supply tube 45 is mounted in thel drum 28 vand feedswater through the inner water chamber 3l through the bend portion 46 ofthe casing lY back through the outer water chamber 4 formed in the outercasing i, the water leaving the casing through the pipe 47. At suitableintervals perforated rings 48 are mounted to retain the outer wall 29and the inner wall 30 in spaced 'relationship to each other and yetallow of the passage yof the water'thereby.

A door or gate 49 is had in the outer casing l to allow access to theinterior parts of the engine for the purpose ofrepairs or renewal, etc.

IThe drum which is rotatably mounted yupon the shaft 6, is supportedthereon by means of brackets 50, which are rigidly connected to thedruni 28 and the shaft 6 to rotate theshat thereby.

ln operation the water supply is fed through the supply tube 45 intotheinner water chamber 3l, and owing tothe fact that said inner waterchamber is of enlarged formation allowing oi greater diameter toward theend portion thereof, the water is forced forward through around the bend4S and back through the outer chamber 4, where it isk exhausted throughthe portion 47. Thus it incloses the combustion chamber 9, thisarrangement giving a mam'mum eciency for cooling purposes.

' The combined fuel and air is `injected un.- der pressure, from thesupplytubes 10 and il into thel combustion chamber 9 where it is jedf bymeans of a spark plug 26,it is than ex anded and Vpassed between theblades 2 and 34 until it has operated upon the extreme blade thereof,when it isy erhausted through the exhaust port 44. The end blades oithe, rotor being of 'a larger surface than the rst blades thereof totake centrifugal kaction .incassa v chamber for lack 0I" air.

As there is always a forward thrust upon the drum through the impact ofthe gases upon the blades 34, a counterbalancing efect is had byallowing a portion of the used gases to flow back through the pipes 42and 43 to iinpinge against the piston disks 40 and 41, the piston disk39 having received the initial impact of the explosion gases in theexplosion chamber 9. This combustion equalizes the thrust in eitherdirection upon the rotating drum.

Having now described our invention what we claim as new and desire tosecure by Letters Patent is l. A gas turbine engine, comprising adouble-walledl casing in successively enlarged sections, the outer wallbeing backturned and overlapping the inner wall, and said walls forminga waterchamber therebetween, and a double-walled rotor in successivelyenlarged sections mounted within said casing, the said rotor sectionsmatching the sections of the casing and the ends of the rotor wallsseated between the end of the linner wall of said casing and thebackturned portion of the outer wall of said casing,

said double walls of said rotor forming aI tative shaft, a `plurality ofrotor'- supports rigidly VAmounted upon said shaft, a rotor rigidly'mounted upon said supports, an auX- iliary wall to said rotor forming awater chamber therebetween, a casing to said rotor having one endbackturned inside of the end of said rotor with a support attachmentloosely mounted upon said shaft, and an interior auxiliary wall to saidcasing forming a water chamber therebetween, said last mentioned waterchamber directly and continuously communicating with said irst mentionedwater chamber.

3. A gas turbine engine, comprising a rol Water chamber rotating With'said rotor with successively enlarged sections to force Water forwardlyunder centrifugal action, when said rotor is rotated, said water chamberof the rotor directly and continuously communicating With and feedingWater to the Water chamber'of said casing.

5. A turbine gas engine comprising a casing having awater chambertherein, one end of said casing being backturned, a rotative shaft, arotor mounted upon said shaft With.

in the confines of said casingv having an internal Water chamber withsuccessively enlarged sections, said Water chamber directly andcontinuouslyV communicating 'with said Water chamber yof said' casing bymeans of the backturned end of said casing, and said rotor being inspaced relationship to said casing, blades arranged upon said rotor insaid space, blades arranged upon said casing in said space andalternating with the blades upon the rotor, a combustion chambercommunicating With said space, safety controlled supply means to injectfuel into said combustion chamber, safety controlled supplymeans toinject air into said combustion chamber, safety controlled supply meansto inject steam into said combustion chamber, and firing means Withinsaid combustion chamber adapted to continuously fire said injected fuel,air and steam, said' firing forcing the burned gases by said blades torotate said rotor, andthe rotation of said rotor forcing Water from theWater chamber in said rotor to the Water chamber in said casing throughcentrifugal action derived from the enlarged sections of the Waterchamber of the rotor.

In testimony whereof we have signed our names to this specification inthe two subscribing Witnesses.

Witnesses:

C. E. Dicos, G. MAXWELL.

Copies ofthi patent may be obtained for live cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

presence of l

